#include <stdio.h>
 
int main(void){
    int nums[]={1,2,3};
    double num1=10.5;
    double num2=20.5;
    double *ptr1=&num1;
    double *ptr2=&num2;
    printf("ptr1-ptr2:%td\n",ptr1-ptr2);
    printf("ptr2-ptr1:%td\n",ptr2-ptr1);
    return 0;
}